Problem 1. Sum of 3 Numbers

let input = [
    '3',  // the input is always a string, so it's '3' and not 3
    '4',
    '11'
];
let print = this.print || console.log;
let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);

let n1 = Number(gets());
let n2 = Number(gets());
let n3 = Number(gets());

let sum = n1 + n2 + n3;
print(sum);